circumferential strain
A measure of myocardial deformation in the short-axis direction, quantifying how the heart muscle contracts around its circumference.
Full Definition
Circumferential strain is a parameter derived from cardiac imaging that measures the percentage change in myocardial circumference during the cardiac cycle. It reflects the heart's ability to squeeze in a circular motion around the left ventricular cavity. Normal circumferential strain values are typically negative, indicating shortening during systole. This measurement is obtained through various imaging modalities including speckle-tracking echocardiography and cardiac MRI with feature tracking or tagging techniques. Reduced circumferential strain indicates impaired myocardial function.
Usage
Usage note: Always express as a negative percentage value for normal function.
In Context
- "Circumferential strain was reduced to -12% in the anterior wall territory." — Echocardiography report
- "Peak circumferential strain values were within normal limits at -18%." — Strain analysis documentation